It’s a bit frustrating. I know that usually occurs when your facing local lag but I was perfectly fine on a baseplate to make sure it wasn’t me and it didn’t register half the keys I wrote or it would delay a bit. Help me because I can’t type in game. 
I have a fix for this that will go out next week. Let me know if you still see this after next Thursday.
Also player:GetMouse().Button1Up doesn’t register it usually takes 5 tries for it to work.
Can’t reproduce that one, it’s working all the time for me.